EP0633225A1 - Procédé de délivrance d'une quantité effective sélectionnée d'une composition granulaire antimicrobienne dans un système aqueux - Google Patents

Procédé de délivrance d'une quantité effective sélectionnée d'une composition granulaire antimicrobienne dans un système aqueux Download PDF

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Publication number
EP0633225A1
EP0633225A1 EP94304897A EP94304897A EP0633225A1 EP 0633225 A1 EP0633225 A1 EP 0633225A1 EP 94304897 A EP94304897 A EP 94304897A EP 94304897 A EP94304897 A EP 94304897A EP 0633225 A1 EP0633225 A1 EP 0633225A1
Authority
EP
European Patent Office
Prior art keywords
antimicrobial composition
dry granular
discharge
aqueous system
effective amount
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP94304897A
Other languages
German (de)
English (en)
Inventor
Leroy E. Rugg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Calgon Corp
Original Assignee
Calgon Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Calgon Corp filed Critical Calgon Corp
Publication of EP0633225A1 publication Critical patent/EP0633225A1/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/687—Devices for dosing solid compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/714—Feed mechanisms for feeding predetermined amounts
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment

Definitions

  • This invention relates to a process for delivering a selected effective amount of a dry granular antimicrobial composition to an aqueous system.
  • Aqueous water systems are susceptible to microbiological growth such as for example bacteria, yeast, fungi and algae. This microbiological growth presents a problem to many industrial and commercial applications, and more specifically includes, but is not limited to the fouling of the components of cooling water systems.
  • Aqueous systems that become infected with microorganisms experience substantial impairment of their efficiency when deposits of the microorganisms build up in the system. These deposits coat the walls of heat exchangers and other vessels, machinery and other processing equipment employed, thus eventually creating blockages in and/or reducing heat transfer.
  • a variety of processes have been proposed to introduce a biocidal agent to an aqueous system for controlling this microbiological growth. It is generally well known by those skilled in the art to introduce a biocide into an aqueous system by manually dumping a quantity of a granular biocide, such as for example bromine or chlorine, to a vessel, and employing dissolve/erosion type feeders such as for example a flow through feeder.
  • a biocidal agent such as for example bromine or chlorine
  • the manual dumping process has numerous drawbacks including exposing personnel to potentially hazardous chemicals. Another drawback associated with the manual dumping process is the deterioration of activity of the biocide when the dry granular biocide is exposed to ambient humidity.
  • dissolve/erosion type feeders are employed to introduce low solubility bromine biocides to aqueous systems.
  • the dissolve/erosion feeder operates by establishing a flow of water through the feeder to cause surface friction between adjacent biocide granules or tablets thus eroding the surface thereof and dissolving the displaced particles.
  • the dissolve/erosion type feeders have several drawbacks. Because the rate of dissolution of the biocide granule or tablet is dependent upon the water temperature and the rate of flow of the water, it is difficult to monitor the amount of biocide introduced to the aqueous system.
  • dissolve/erosion type feeders make it difficult if not impossible to effectively make an addition of a discrete or selected amount of a biocide to maintain a desired concentration of the biocide.
  • An example of a dissolve/erosion type feeder is the feeder identified as Model BF-10 commercially available from Calgon Corporation, Pittsburgh, Pennsylvania, U.S.A.
  • U.S. Patent 3,626,972 discloses a soluble granule feeder for use in swimming pools having a pump joined to suction and return lines wherein each feeder is said to comprise a mixing tank open to the atmosphere and connected to a granule supply bin.
  • This patent states that a bypass conduit taps the return line to supply liquid from a portion of the return line flow to the mixing tank.
  • a mixing tank open to the atmosphere receives chlorine granules that are mixed with a measured amount of water to create a chlorine solution that is then passed through a Venturi unit to the swimming pool system.
  • the process of the instant invention does not employ a mixing tank or a valving cylinder responsive to a float, and eliminates the problems associated with antimicrobial compositions exposure to the atmosphere and ambient humidity. Further, the process of the instant invention delivers the antimicrobial composition in dry granular form to the aqueous system being treated.
  • U.S. Patent 3,710,817 discloses an apparatus for adding solute to a liquid such as swimming pool water in which a first mixing tank is supported on a second mixing tank, each of which is connected to the water circulating system of the pool.
  • the apparatus comprises a first mixing tank, a second mixing tank, means for bypassing a portion of the recirculating water into the bottom of the first mixing tank, means controlling the water level within the first mixing tank at which water is transmitted into the second mixing tank, and means for connecting the second mixing tank to suction means such as a circulation pump or a venturi in the pump line such that the second mixing tank has a float controlled valve which releases the water and solute to the suction side of the venturi or pump.
  • This patent states that the means for controlling the water level within the first mixing tank effects the dissolution of the proper number of soluble chlorine cakes within the first mixing tank that are exposed to circulating water for the period that the pump is turned on. This patent states that the number of chlorine cakes exposed to the water at any one time determines the concentration of the chlorine delivered to the second tank.
  • Figure 1 shows one arrangement of the sealed rigid container means, discharge means, resealable openings(s) and discharge valve means employed in the process of the present invention.
  • Figure 2 shows one arrangement of the sealed rigid container means, discharge means, resealable opening(s), discharge valve means, and manual mechanical means employed in the process of the present invention.
  • Figure 3 shows one arrangement of the sealed rigid container means, discharge means, resealable opening(s), discharge valve means, manual mechanical means, programmable dispensing means, and eductor means employed in the process of the present invention.
  • the present invention has met the above-described needs.
  • the present invention provides a process for delivering a selected effective amount of a dry granular antimicrobial composition to an aqueous system comprising (a) adding the dry granular antimicrobial composition into sealed rigid container means for containing the dry granular antimicrobial composition, wherein the sealed rigid container means has at least one resealable opening for permitting addition to and discharge from the sealed rigid container means, (b) establishing sealed communication of at least one of the resealable opening(s) of the sealed rigid container means with discharge means for effecting the delivery of the dry granular antimicrobial composition from the sealed rigid container means to the aqueous system, wherein the discharge means has discharge valve means for effecting discharge of the selected effective amount of the dry granular antimicrobial composition from the discharge means, (c) removing at least one seal from at least one of the resealable opening(s) of the sealed rigid container means that is in sealed communication with the discharge means for effecting the discharge of the dry
  • Another embodiment of this invention provides a process, as mentioned hereinabove and described herein, including repeating steps (d), (e), and (f) for effecting the delivery of the selected effective amount of the dry granular antimicrobial composition to the aqueous system for achieving an effective microbial inhibitory concentration.
  • the process includes wherein the selected effective amount of the dry granular antimicrobial composition delivered per cycle of operation and completion of operation to the aqueous system is at least about 0.10 pounds, more preferably from about 0.10 to 100 pounds, and most preferably about 10 pounds.
  • the instant invention is directed to a process for delivering a selected effective amount of a dry granular antimicrobial composition to an aqueous system.
  • antimicrobial refers to compositions employed for killing, as well as the inhibition of or control of the growth of a microorganism, such as for example, bacteria, yeasts, fungi, or algae, and combinations thereof.
  • the term "effective amount” refers to that amount of a dry granular antimicrobial composition necessary to bring about a desired result, such as but not limited to killing, inhibiting or controlling the growth of a microorganism.
  • aqueous system includes, but is not limited to, water carrying systems such as for example a cooling system (including for example a cooling tower), means for heat exchange, means for industrial and/or commercial processing or scrubbing, or a body of water such as for example a lake, pond or stream.
  • a cooling system including for example a cooling tower
  • means for heat exchange means for industrial and/or commercial processing or scrubbing
  • a body of water such as for example a lake, pond or stream.
  • the term "granular" means a particle, such as for example but not limited to, having a size ranging from about a powder to about a coarse granule, as generally understood by those skilled in the art. It will be appreciated by those skilled in the art, however, that while it is preferable that each particle employed in the process of the instant invention has a size ranging from about a powder to a coarse granule, the size of the particle is generally unimportant relative to the process of the present invention.
  • the present invention provides a process for delivering a selected effective amount of a dry granular antimicrobial composition to an aqueous system comprising (a) adding the dry granular antimicrobial composition into sealed rigid container means 1, as shown in Figure 1, for containing the dry granular antimicrobial composition, wherein the sealed rigid container means 1 has at least one resealable opening 3 and/or 5 for permitting addition to and discharge from the sealed rigid container means 1; (b) establishing sealed communication of at least one of the resealable opening(s) 3 and/or 5 of the sealed rigid container means 1 with discharge means 7 for effecting the delivery of the dry granular antimicrobial composition from the sealed rigid container means 1 to the aqueous system, wherein the discharge means 7 has discharge valve means 9 for effecting the discharge of the selected effective amount of the dry granular antimicrobial composition from the discharge means 7; (c) removing at least one seal 11 from at least one of the resealable opening(s) 3 of the sealed rigid container means 1 that is in sealed
  • completing at least one operation of the discharge valve means 9 includes, but is not limited to, closing the discharge valve means 9.
  • Figure 1 shows for purposes of illustration a particular embodiment of the instant invention wherein the placement of the resealable opening(s) 3 and 5 are positioned at the bottom and top, respectively, of the rigid container means 1, the placement of the resealable opening(s) 3 and/or 5 of the rigid container means 1 is purely arbitrary dependent only upon employing gravity to effect the discharge of the dry granular antimicrobial composition from the sealed rigid container means 1 and into the discharge means 7.
  • the process of the instant invention includes removing seal 11 from resealable opening 3 of the sealed rigid container means 1 for effecting the discharge of the dry granular antimicrobial composition from within the sealed rigid container means 1 through resealable opening 3 and into the discharge means 7.
  • a process is provided, as hereinabove described, including repeating steps (d), (e), and (f) for effecting the delivery of the selected effective amount of the dry granular antimicrobial composition to the aqueous system for achieving an effective microbial inhibitory concentration.
  • Another embodiment of this invention provides for the process as described hereinabove including employing manual mechanical means 15, as shown in Figure 2, for effecting the operation and the completion of the operation of the discharge valve means 9.
  • a process is provided, as described hereinabove, including employing the discharge valve means 9 under the control of programmable dispensing means 17, as shown in Figure 3, for controlling the number of cycles of delivery of the selected effective amount of the dry granular antimicrobial composition to the aqueous system being treated.
  • the programmable dispensing means 17 is responsive for dispensing the selected effective amount of the dry granular antimicrobial composition.
  • the programmable dispensing means 17 is responsive for monitoring the amount of the dry granular antimicrobial composition within the sealed rigid container means 1.
  • the programmable dispensing means 17 is responsive for monitoring the amount of the dry granular antimicrobial composition remaining within the sealed rigid container means 1 upon completing at least one cycle of delivery of the selected effective amount of the dry granular antimicrobial composition to the aqueous system being treated.
  • the process of this invention includes wherein the selected effective amount of the dry granular antimicrobial composition delivered to the aqueous system is at least about 0.10 pounds per cycle of operation and completion of operation of the discharge valve means 9.
  • the process of this invention includes delivering from about 0.10 to 100 pounds of the dry granular antimicrobial composition to the aqueous system per cycle of operation and completion of operation of the discharge valve means 9, and most preferably about 10.0 pounds.
  • the dry granular antimicrobial composition is a dry granular oxidant antimicrobial composition or a dry granular nonoxidant antimicrobial composition.
  • the dry granular oxidant antimicrobial composition is a biocide selected from the group consisting of sodium dichloro-s-triazinetrione, sodium bromide, and combinations thereof.
  • the dry granular oxidant antimicrobial composition is calcium hypochlorite.
  • the process, as described herein employs a dry granular nonoxidant antimicrobial composition, such as for example, but not limited to, tetrahydro-3,5-dimethyl-2-H-1,3,5-thiadiazine 2-thione.
  • a dry granular nonoxidant antimicrobial composition such as for example, but not limited to, tetrahydro-3,5-dimethyl-2-H-1,3,5-thiadiazine 2-thione.
  • dry granular antimicrobial compositions employed by the instant process are preferably made up of particles having a size ranging from about a powder to coarse granules, as understood by those skilled in the art.
  • a further embodiment of the present invention provides a process as described herein wherein the sealed rigid container means 1 is transportable sealed rigid container means.
  • the sealed rigid container means 1 is made of any suitable material including, but not limited to, aluminum, stainless steel, or plastic type vinyl polymers such as for example poly(vinyl chloride), or copolymers thereof.
  • the discharge valve means 9 is any suitable valve, and preferably is a valve selected from the group consisting of a rotary air lock valve, a star valve, a plug valve, a ball valve, a slide valve, a plunger valve, and a butterfly valve, and combinations thereof.
  • a process is provided as described herein including providing eductor means 19, as shown in Figure 3, for transporting the dry granular antimicrobial composition from the discharge means 7 to the aqueous system, wherein the eductor means 19 is in communication with at least a portion of the discharge means 7, and wherein the portion of the discharge means 7 is located below the discharge valve means 9.
  • this process includes wherein the eductor means 19 provide a unidirectional flow of the granular antimicrobial composition from the portion of the discharge means 7 located below the discharge valve means 9 to the aqueous system being treated.
  • the eductor means may employ, for example, air or water for effecting such unidirectional flow. It will be appreciated that when water is employed for effecting such unidirectional flow, the dry granular antimicrobial composition becomes solubilized.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
EP94304897A 1993-07-08 1994-07-04 Procédé de délivrance d'une quantité effective sélectionnée d'une composition granulaire antimicrobienne dans un système aqueux Withdrawn EP0633225A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US90222 1993-07-08
US08/090,222 US5427694A (en) 1993-07-08 1993-07-08 Process for delivering a selected effective amount of a dry granular antimicrobial composition to an aqueous system

Publications (1)

Publication Number Publication Date
EP0633225A1 true EP0633225A1 (fr) 1995-01-11

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EP94304897A Withdrawn EP0633225A1 (fr) 1993-07-08 1994-07-04 Procédé de délivrance d'une quantité effective sélectionnée d'une composition granulaire antimicrobienne dans un système aqueux

Country Status (4)

Country Link
US (1) US5427694A (fr)
EP (1) EP0633225A1 (fr)
AU (1) AU681143B2 (fr)
CA (1) CA2127564C (fr)

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US5560523A (en) * 1994-12-16 1996-10-01 Betz Laboratories, Inc. Apparatus for measuring and transferring liquid
US6183631B1 (en) 1999-09-14 2001-02-06 Cormier General Contractor, Inc. Solution treatment agent supply apparatus
US6309551B1 (en) 1999-09-14 2001-10-30 Hoot Aerobic Systems, Inc. Solution treatment agent supply apparatus
US6978911B2 (en) * 2001-12-19 2005-12-27 Auto Wax Company, Inc. Apparatus and methods for producing and dispensing automobile appearance care products charged to a customer on a selected bases
US20040065675A1 (en) * 2001-12-19 2004-04-08 Floyd Timothy H. Apparatus for producing and dispensing automobile appearance care products
US20040065682A1 (en) * 2001-12-19 2004-04-08 Floyd Timothy H. Apparatus for producing and dispensing selected amounts of automobile appearance care products
US20040206778A1 (en) * 2001-12-19 2004-10-21 Floyd Timothy H Apparatus for producing and dispensing selected automobile appearance care products
US20030201282A1 (en) * 2001-12-19 2003-10-30 Floyd Timothy H. Systems and methods for producing and dispensing automobile appearance care products
US6988637B2 (en) * 2001-12-19 2006-01-24 Auto Wax Company, Inc. Apparatus and methods for a customer to produce and dispense automobile appearance care products
US20040060946A1 (en) * 2001-12-19 2004-04-01 Floyd Timothy H. Apparatus with selected features for producing and dispensing automobile appearance care products
US20040065681A1 (en) * 2001-12-19 2004-04-08 Floyd Timothy H Apparatus in selected housings for producing and dispensing automobile appearance care products
US6810929B1 (en) 2003-06-12 2004-11-02 Ppg Industries Ohio, Inc. Transportable container for fluidizable material and method
US20060144866A1 (en) * 2003-06-25 2006-07-06 Serby-Tech Ltd. Gating system for flowable material and conveying apparatus including same
JP2007092664A (ja) * 2005-09-29 2007-04-12 Denso Corp ブローバイガス環流装置
WO2008015678A2 (fr) * 2006-08-03 2008-02-07 Bromine Compounds Ltd. Procédé, dispositif et système pour le traitement de l'eau
US8398850B2 (en) 2010-09-17 2013-03-19 Evapco, Inc. Water treatment feeder device and a water treatment feeder system
IL244872B (en) 2016-04-03 2022-03-01 Treitel Chemical Eng Ltd Apparatus and method for dosing powdery or granular material

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GB191203674A (en) * 1912-02-14 1913-02-14 Water Softeners Ltd Improvements in and relating to Apparatus for Mixing Liquids particularly applicable for the Softening and Purification of Water.
US3107156A (en) * 1959-09-28 1963-10-15 Erlen Products Company Water treatment apparatus
US3727632A (en) * 1971-01-18 1973-04-17 A Pansini Automatic chlorinator, plunger selector type
FR2171534A5 (fr) * 1972-02-04 1973-09-21 Walrave Ets
US4564506A (en) * 1983-05-23 1986-01-14 Saputo Lorraine E Water treatment dispensing system
GB2195094A (en) * 1986-07-18 1988-03-30 Healplan Ltd Dry powder dosing
US5019250A (en) * 1989-09-08 1991-05-28 Lorenzen Walter C Automatic chemical dispenser

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Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191203674A (en) * 1912-02-14 1913-02-14 Water Softeners Ltd Improvements in and relating to Apparatus for Mixing Liquids particularly applicable for the Softening and Purification of Water.
US3107156A (en) * 1959-09-28 1963-10-15 Erlen Products Company Water treatment apparatus
US3727632A (en) * 1971-01-18 1973-04-17 A Pansini Automatic chlorinator, plunger selector type
FR2171534A5 (fr) * 1972-02-04 1973-09-21 Walrave Ets
US4564506A (en) * 1983-05-23 1986-01-14 Saputo Lorraine E Water treatment dispensing system
GB2195094A (en) * 1986-07-18 1988-03-30 Healplan Ltd Dry powder dosing
US5019250A (en) * 1989-09-08 1991-05-28 Lorenzen Walter C Automatic chemical dispenser

Also Published As

Publication number Publication date
CA2127564A1 (fr) 1995-01-09
AU6619794A (en) 1995-01-19
US5427694A (en) 1995-06-27
AU681143B2 (en) 1997-08-21
CA2127564C (fr) 2005-04-12

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